Sennheiser ew-D SKM-S S1-7
Sennheiser EW-D SKM-S S1-7 - digital handheld transmitter for EW-D wireles systems with on/off switch, without microphone capsule, operation with 2x 1.5 volt AA batteries or optional BA70 rechargeable battery, frequency range S1-7: 606,2–662 MHz, transmit power: 10 mW, dimensions: 40 x 200 mm (without microphone capsule), weight: approx. 195 g (without microphone capsule)